Transcript
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Getting through complex cover to basement
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• First Drilling
– Surface and Underground drilling contractor
–Main operations in Australia and North America
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A short History of exploration
drilling in the Eucla Basement
Source: Colcrete - Eurodrill
Source: Keely & Boateng (1987)
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Getting There
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Critical Setup
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Drilling Fluid Program
Target Fluid Properties
Mud Weight 1.00 – 1.05 Sg
Viscosity 40 - 45 sec / quart
Filtrate < 20 ml / 30 min
Filter cake 0.5 - 1.0 mm
pH 8.0 – 9.5
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What to be aware of
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